Get Android shared preferences value in activity/normal class

Question

I have made a shared preference activity that store the user settings, now i want to get values in a activity or normal java class.please provide a solution or example i have already tried this code but failed.

public void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    SharedPreferences channel=this.getSharedPreferences(strFile, Context.MODE_PRIVATE);
    strChannel=channel.getString(keyChannel,"Default").toString();
    Toast.makeText(getApplicationContext(), strChannel, Toast.LENGTH_LONG).show();
}                     

in this code strfile for eg. com.android.pack.ClassName is SharedPreference Activity from values to be fetched, and keyChannel is key that is same in SharedPreference Activity.

Kindly provide the solution.

Answer 1

If you have a SharedPreferenceActivity by which you have saved your values

SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); String imgSett = prefs.getString(keyChannel, ""); 

if the value is saved in a SharedPreference in an Activity then this is the correct way to saving it.

SharedPreferences shared = getSharedPreferences(PREF_NAME, MODE_PRIVATE); SharedPreferences.Editor editor = shared.edit(); editor.putString(keyChannel, email); editor.commit();// commit is important here. 

and this is how you can retrieve the values.

SharedPreferences shared = getSharedPreferences(PREF_NAME, MODE_PRIVATE); String channel = (shared.getString(keyChannel, "")); 

Also be aware that you can do so in a non-Activity class too but the only condition is that you need to pass the context of the Activity. use this context in to get the SharedPreferences.

mContext.getSharedPreferences(PREF_NAME, MODE_PRIVATE); 

Answer 2

I tried this code, to retrieve shared preferences from an activity, and could not get it to work:

        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);     sharedPreferences.getAll();     Log.d("AddNewRecord", "getAll: " + sharedPreferences.getAll());     Log.d("AddNewRecord", "Size: " + sharedPreferences.getAll().size()); 

Every time I tried, my preferences returned 0, even though I have 14 preferences saved by the preference activity. I finally found the answer. I added this to the preferences in the onCreate section.

getPreferenceManager().setSharedPreferencesName("defaultPreferences");

After I added this statement, my saved preferences returned as expected. I hope that this helps someone else who may experience the same issue that I did.

Answer 3

This is the procedure that seems simplest to me:

SharedPreferences sp = getSharedPreferences("MySharedPrefs", MODE_PRIVATE);
SharedPreferences.Editor e = sp.edit();

    if (sp.getString("sharedString", null).equals("true")
            || sp.getString("sharedString", null) == null) {
        e.putString("sharedString", "false").commit();
        // Do something
    } else {
        // Do something else
    }